diff --git a/src/Pinyin/Pinyin.php b/src/Pinyin/Pinyin.php
index dbdb014f..ad932e57 100644
--- a/src/Pinyin/Pinyin.php
+++ b/src/Pinyin/Pinyin.php
@@ -158,13 +158,12 @@ public static function parse($string, array $settings = array())
             $string = $instance->justChinese($string);
         }
 
-        $pinyin = $instance->string2pinyin($string);
-
+        $source = $instance->string2pinyin($string);
         // add accents
         if ($settings['accent']) {
-            $pinyin = $instance->addAccents($pinyin);
+            $pinyin = $instance->addAccents($source);
         } else {
-            $pinyin = $instance->removeTone($pinyin);
+            $pinyin = $instance->removeTone($source);
         }
 
         //add delimiter
@@ -173,7 +172,7 @@ public static function parse($string, array $settings = array())
         $return = array(
                    'src'    => $string,
                    'pinyin' => $instance->escape($delimitedPinyin),
-                   'letter' => $instance->getFirstLetters($pinyin, $settings),
+                   'letter' => $instance->getFirstLetters($source, $settings),
                   );
 
         return $return;
diff --git a/tests/TestCase.php b/tests/TestCase.php
index 93a4be8e..71e1bc68 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -1,7 +1,11 @@
 <?php
 
-//include __DIR__ . '/../vendor/autoload.php';
-include __DIR__ . '/../src/Pinyin/Pinyin.php';
+
+if (gethostname() == 'overtrue') {
+    include __DIR__ . '/../src/Pinyin/Pinyin.php';
+} else {
+    include __DIR__ . '/../vendor/autoload.php';
+}
 
 use Overtrue\Pinyin\Pinyin;
 
@@ -40,6 +44,7 @@ public function testLetters()
         $this->assertEquals('z y', Pinyin::letter('重要'));
         $this->assertEquals('nh', Pinyin::letter('您好', array('delimiter' => '')));
         $this->assertEquals('kxll', Pinyin::letter('康熙来了', array('delimiter' => '')));
+        $this->assertEquals('A B Z Z Q Z Z Z Z', Pinyin::letter("阿坝藏族羌族自治州", array('uppercase' => true)));
         $this->assertEquals('d z x w q l x b d d z d g m h', Pinyin::letter('带着希望去旅行，比到达终点更美好'));
         $this->assertEquals('z q s l z w z w', Pinyin::letter('赵钱孙李 周吴郑王'));
     }